Support for decks of bridges, viaducts and the like

Abstract

Support for decks (3) of bridges, viaducts and the like, comprising a first and a second surface (6, 7), for the application and countering of a load, respectively, which can slide relatively and an anti-friction bearing (8) arranged between said surfaces (6, 7), the bearing (8) comprising at least one electrical contact (11) which is embedded therein at a predetermined distance from at least one of said opposing sides (9, 10) and can close or open an alarm circuit (15) as a result of predetermined wear and tear of said bearing (8).

1 . Support for decks ( 3 ) of bridges, viaducts and other overpasses comprising a first and a second surface ( 6 ,  7 ), for application and countering of a load, respectively, which can slide relatively and an anti-friction bearing ( 8 ) arranged between said first and second surfaces ( 6 ,  7 ), it being possible to replace said bearing ( 8 ) as a result of wear and tear that has a consequent reduction in thickness between opposing sides ( 9 ,  10 ) of the latter, comprising at least one electrical contact ( 11 ) which is embedded in a thickness of said bearing ( 8 ) at a predetermined distance from at least one of said opposing sides ( 9 ,  10 ) and can close or open an alarm circuit ( 15 ) as a result of predetermined wear and tear of said bearing ( 8 ). 
     
     
         2 . The support for decks ( 3 ) according to  claim 1 , wherein at least two electrical contacts ( 11 ,  12 ) are embedded in said bearing ( 8 ) at different distances from at least one of said opposing sides ( 9 ,  10 ) to close or open said alarm circuit ( 15 ) as a result of predetermined different wear conditions of said bearing ( 8 ). 
     
     
         3 . The support for decks ( 3 ) according to  claim 1 , wherein at least three electrical contacts ( 11 ,  12 ,  13 ) are embedded in the bearing ( 8 ) at different distances from at least one of said opposing sides ( 9 ,  10 ) to close or open said alarm circuit ( 15 ) as a result of predetermined different wear conditions of said bearing ( 8 ). 
     
     
         4 . The support for decks ( 3 ) according to  claim 1  wherein said bearing ( 8 ) is in sliding contact with at least one of said first and second surfaces ( 6 ,  7 ), said surface comprises an auxiliary electrical contact cooperating with said at least one electrical contact ( 11 ) in the bearing ( 8 ) to close or open said alarm circuit ( 15 ). 
     
     
         5 . The support for decks ( 3 ) according to  claim 1 , wherein at least three series of powered wires are embedded at different points on said bearing ( 8 ) and/or at different distances from the face of the bearing ( 8 ) subject to wear and tear such that when said powered wires are short-circuited with an electric conductor plate applied to the support ( 3 ), an alarm signal is activated for a first attention threshold, a second alarm signal and a third end of life signal for a first, a second and a third reduction in thickness of the bearing, respectively. 
     
     
         6 . Anti-friction bearing ( 8 ) for supports for decks according to  claim 1  suitable for being arranged so as to be replaceable as a result of wear and tear that has a consequent reduction in thickness between opposing sides of the latter, between a first and a second surface ( 6 ,  7 ) of said support, for the application and countering of a load, respectively, that can slide relatively, the bearing comprising at least one electrical contact ( 11 ) which is embedded in the thickness of said bearing ( 8 ) at a predetermined distance from at least one of the opposing sides ( 9 ,  10 ) of said bearing ( 8 ) and can close or open an alarm circuit ( 15 ) as a result of predetermined wear and tear of said bearing ( 8 ). 
     
     
         7 . The anti-friction bearing ( 8 ) according to  claim 6 , wherein at least two electrical contacts ( 11 ,  12 ) are embedded at different distances from at least one of said opposing sides ( 9 ,  10 ) to close or open said alarm circuit ( 15 ) as a result of predetermined different wear conditions of said bearing ( 8 ). 
     
     
         8 . The anti-friction bearing ( 8 ) according to  claim 6 , wherein at least three electrical contacts ( 11 ,  12 ,  13 ) are embedded at different distances from at least one of said opposing sides ( 9 ,  10 ) to close or open said alarm circuit ( 15 ) as a result of predetermined different wear conditions of said bearing ( 8 ). 
     
     
         9 . The anti-friction bearing ( 8 ) according to  claim 6 , wherein powered wires are embedded in said bearing ( 8 ) that have different positions with respect to the thickness of said bearing.